Remove wrongly re-introduced delete queries with limit from delete.slt

Removed unsupported delete queries with limit from test file.

Author: martin-g

datafusion/sqllogictest/test_files/delete.slt

@@ -117,30 +117,6 @@ physical_plan_error This feature is not implemented: Physical plan does not supp
 
 # Delete with limit
 
-query TT
-explain delete from t1 limit 10
-----
-logical_plan
-01)Dml: op=[Delete] table=[t1]
-02)--Limit: skip=0, fetch=10
-03)----TableScan: t1
-physical_plan
-01)CooperativeExec
-02)--MemDeleteExec
-
-
-query TT
-explain delete from t1 where a = 1 and b = '2' limit 10
-----
-logical_plan
-01)Dml: op=[Delete] table=[t1]
-02)--Limit: skip=0, fetch=10
-03)----Filter: CAST(t1.a AS Int64) = Int64(1) AND t1.b = CAST(Utf8("2") AS Utf8View)
-04)------TableScan: t1
-physical_plan
-01)CooperativeExec
-02)--MemDeleteExec: predicate=[CAST(a@0 AS Int64) = 1, b@1 = CAST(2 AS Utf8View)]
-
 statement error This feature is not implemented: Delete-limit clause not supported
 delete from t1 limit 10;